FAST_VIDEO_SIGNAL_AMPLITUDE_MEASURER

Published:2009/6/17 22:08:00 Author:May | From:SeekIC

Video-signal amplitude can be measured with this simple circuit, which is basically a modified standard peak detector. The device can verify RGB generated by video RAMDACs. UI is a high-speed bttffer and U2 is a latched comparator. C1 is a hold capacitor. Reset is performed by Q3. U2 has a latch that maintains the last comparator state. The reset holds the comparator output low during the reset operation. The dc output voltage is equal to the signal's maximum amplitude.



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